The Anti-Saloon League compiled two volumes of documents following a scandal in Texas involving the Texas Brewers' Association and a number of Texas politicians.  It's conveniently titled The Brewers and Texas Politics (San Antonio: Passing Show Printing Co., 1916), and is held by several libraries.  Of course it's the prohibitionists' edition of things, but it includes a variety of primary docments, particularly incriminating letters, concerning the lobbying activities of antiprohibitionists, albeit mostly in the one state.
 
James Ivy
Trinity University